package com.oracle.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter("/doLogin")
public class AdminLoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest)servletRequest;
        HttpServletResponse response = ( HttpServletResponse)servletResponse;
        String oldCode = (String)request.getSession().getAttribute("valcode");
        String newCode = request.getParameter("code");
        if (newCode == null || newCode.equals("")){
            request.setAttribute("codeError", "验证码不正确");
            request.getRequestDispatcher("/adminLoginView").forward(request, response);
            return;
        }
        if (!oldCode.equals(newCode)){
            request.setAttribute("codeError", "验证码不正确");
            request.getRequestDispatcher("/adminLoginView").forward(request, response);
            return;
        }
        request.getSession().removeAttribute("noAdmin");
        request.getSession().removeAttribute("valcode");
        filterChain.doFilter(request, response);
        return;
    }

    @Override
    public void destroy() {

    }
}
